Rotary engine.



No. 880,182. PATENTE) 88125.: 1808,.

J. ZURA.

ROTARY ENGINE. Y

APPLICATION FILED JULY 1, 1907.

A, FiQLZ, 26

Witnesses.

2 SHEETS-.SHEET 2.

NITED STATES IDATENT OFFICE.

.JOSEF ZURA, or BERLIN, GERMANY, AssIGNoR or ONE-HALF 'ro GEBRDER HAMMER, or

BERLIN, GERMANY.

ROTARY ENGINE Specification of Letters Patent.

Patented Feb. 25, 1 908.

Appiioaion fumi Juiy 1.1907. semi No. 381.760.

To all whom it may concern:

.Be it known that I, JOSEF ZURA, a subject of the King of Prussia, residing at and whose post-ofiice address is Wichertstr. 153, Berlin N., Germany, haveinvented certain new and useful Improvements in Rotary Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked'thereon, which forni a part of this specification.

The present invention relates to a rotary engine which is Vparticularly suitable for working as a motor, but which can also work as a pump.

The invention consists substantially in the rotating piston being made Huid-tight by means of bars adjustable on the piston, a nose ofone bar being guided positively on a sliding face of the other bar at the oints between the bars. In this manner a good piston joint is obtained.

In order that the invention may be clearly understood reference is made to the accompanying drawings in which one form of the new rotary engine is represented by way of example, the same working in this case as a motor; in the drawings Figure 1 is a vertical transverse section on the line A-B in Fig. 2; Fig. 2 is a vertical longitudinal section on the line C-D in Fig. 1 Fig. 3 is a side elevation of the gearing which drives the abutment-drum, and Fig. 4 is a plan of this gearing; Fig. 5 is a side elevation of the packing bars arranged on the piston'; Fig. 6 is a front elevation of a part of these packing bars, and Fig. 7 shows the individual parts according to Fig. 6 when they have been separated and in various views.

Similar reference numerals refer to similar parts in all views.

The cylinder-casing 2 is arranged on thev baselate 1 (Fig. 1) and is closed at both ends by covers 3 (Fig. 2). The covers 3 are provided with necks 4 projecting into the interior of the cylinder, and together with a pedestal 1a (Fig. 2) serve as bearings for the main shaft 5. This shaft 5 has a thickened part 6 between the necks 4 of the cylinder ends which serves as' piston-drum. The

Acylinder-casing 2.

plate-shaped piston 7 (Fig. 1) is attached to this piston-drum 6.

A casing 8 (Fig. 1) is provided at the side of the cylinder-casing 2 of smaller interior diameter than the latter, in which a closingor abutment-drum 9 for limiting the working chamber is revoluble. rIhis abutment-drum slides in hollows 11 (Fig. 1) of the necks 4 of the covers and also contacts the piston-drum 6. The axis of the abutment-drum 9 lies parallel to the axis of the piston-drum 6 and a little below the latter axis.

A recess 13 (Fig. 1) is provided in the abutment-drum 9, into which the piston 7 enters when it rotates in the direction of the arrow according to Fig. 1. This abutment-drum is provided with a shaft 14 (Fig. 3) which projects laterally out of the casino' 8. A toothed wheel 15 (Figs. 3 and 4) is oose on the shaft 14 and engages with a toothed wheel 16 fastened on the main shaft 5. The toothed wheel 15 is provided with clutches 17, which operate against clutches 18 of a disk 19 fastened on the shaft 14. As may be seen in Fig. 3 there are gaps 2O between the clutches 1 7 and 18, so that the shaft 14 can rotate a small distance independently of the toothed wheel' 15.

The abutment-drum 9 is generally rotated by the main shaft 5 by means of the toothed wheels 16, 15 and the clutches 17 operating against the clutches 18. As soon as the piston 7 has come out of the recess 13 (Fig. 1) of the abutment-drum 9, however, the rotation of the abutment-drum 9 is accelerated by the lever 22 acting against the lever 21. The gaps 20 between the clutches 17, 18 enable the shaft 14 to advance relatively to the toothed wheel 15. @wing to this acceleration of the rotation of the abutment-drum 9, the clearance in the cylinder is reduced.

The driving medium flows through an admission channel 23 (Fig. 1) into the working chamber and escapes through an exhaust channel 24. The admission port 23 is controlled by a tubular slide-valve 25 which is revoluble in a valve-box 26 provided on the An arm 28 is fastened on the revoluble shaft 27 of the slide-valve (Fig. 2) and is reciprocated by means of a rod 29 by an eccentric 30 arranged on the shaft 5, so that communication between the slide valve port and the inlet port is alternately established or interrupted. The driving medium flows at 26a into the valve-box and asses through a suitable opening of the tubu ar slide-valve 25 into the interior of the latter.

In order to relieve the pressure on the abutment-drum 9 and to force it against the pistondrum 6, the casing 8 is rovided with a recess 31 into which tthe driving medium flows through a pipe 33 extending from the valve-box 26 to the casing 8. of the driving medium into the pipe 33 is regulated by a port 34 of the valve 25. The driving medium can also flow into the recess 31 through one or more channels 32 lprovided in the abutment-drum 9 which temporarily come into connection with the working chamber when the abutment-drum 9 rotates.

The piston 7 is provided with recesses 35 (Fi 2) in which five bars which serve for pac ring this piston are adjustably mounted, namely, one outsidev bar 36, two lateral bars 37 and two inner bars 38. All these bars 36, 37, 38 are fitted exactly into the recesses 35. rlhe outside bar 36 slides on the inside surface of the casing 2, the two lateral bars 37 slide on the inside surface of the covers 3 and' the two inner bars 38 slide on the surface of the necks 4 of the covers. The outside bar 36 (Figs. 6 and 7) is half cut away at both ends in such a manner that a sliding face 39 and a shoulder 40 with a sliding face 41 are formed. Further, on the side of the bar 36 which faces inwards, there is provided an approximately semi-circular projection 42, and the said bar 36 is also provided with a hole 43 at each end.

Each side bar 37 is half cut away corresponding to the bar 36 at the endvwhich is uppermost in Figs. 5, 6 and 7, so that a sliding face 44 and a rounded nose 45 are formed. The face 44 lies against the face 39, whereas vthe nose 45 lies with its face 46 against the face 41 of the bar 36. Further, the side bar 37 has an extended recess 47, on the face 59 of which the projection 42 of the bar 36 slides steam-tight, as well as a longitudinal slot 48. A pin 49 attached in the hole 43 of the bar 36 extends through this longitudinal slot 48. It is therefore evident that the bars 36, 37 can be displaced with respect to one another in an axial, but not in a radial direction, so that they are mutually guided positively in an axial direction. Moreover, the rounded nose 45 and the rounded projection 42 render possible a slight mutual rotation of the bars 36, 37.

Each bar 37 is provided at its lower end with a tongue 50, as well as a guide 51 to which a cavity 52 connects. Further, the side bar 37 is provided with a rounded. part 53' on its inside. In each of the inner bars 38 a recess 54 is provided in which the tongue The admission l Further, each bar 38 has a rounded head 55 which can slide steam-tight in the guide 51 of the adjacent bar 37. Again, on the bar 38, a curved shoulder 56 is provided on` which the face 53 of the bar 37 can slide steam-tight.

In the cavity 52 of each bar 37 there is a spring 57 arranged which presses a pin 58 against the head 55.

From the foregoing it is evident that the adjacentv bars 37 38 can move independently of one another ina radial, but not 1n an axial direction, so that they are mutually positively guided in a radial direction.

The outside bar 36 and the inside bars 38 are pressed a art by springs 60 arranged in grooves 61 ig. 2) of the piston 7, whereas the inner bars and the side bars are pressed apart by a spring 62. arranged in a groove 63 o the piston 7, as well as by springs`62a (Fig. 6) arranged in suitable manner. The inner bars 38 are'provided with shoulders 64 (Fig. 6) which are pressed against faces 65 (Fig. 2) of the necks 4 of the covers.

Infconsequence of the special formation of the bars 36, 37, 38 at their joints, these bars always remain in contact with the fric@ tion surfaces of the stationary parts, in spite of unequal wearing of the covers 3.

The above described rotary engine works in the following manner: The working chamber is formed by the piston-drum 6, piston 7, casing 2, abutment-drum 9, covers 3 vand necks 4. The driving lmedium flows in through the channel 23 controlled by the rotary slide-valve 25 (Fig. 1) and moves the piston 7 in the direction of the arrow (Fi'g. 1) so that the main shaft 5 is rotated. When this main shaft 5. rotates the abutment-drum 9 is also rotated by means of the toothed wheels 16., 15 (Fig. 4). The piston 7 enters, when rotating, into the recess 13 of the abutment-drum 9. As soon as the piston has left this recesss 13 the rotation of the abutmentedrum 9 is accelerated in the above described manner by thelever 22 acting against the lever 21 (Fig. 3)', whereby the abutmentdrum 9 advances with respect to the toothed wheel 15. The used driving medium escapes through the outlet 24.

What 1 claim as my invention and desire to secure by Letters Patent is 1. In a machine of the type described, the combination with a cylinder, a shaft rotatable therein and a `piston on said shaft, of packing members carried by the piston coinprising an outer radially movable bar, axially and radially movable lateral bars, and axially and radially movable inner bars, and means connecting said bars.

2. In a machine ofthe type described', the combination with a cylinder, a shaft rotatable therein, and a piston on said shaft, of a 50y of the adjacent-side bar 37 engages. 1 plurality of packing members comprising an outer radially movable bar, lateral bars, means connecting the latter with the radially movable bar adapted to permit independent axial displacement of the lateral bars, inner bars, and means connecting the latter with the lateral bars adapted to permit independent radial displacement of the inner and lateral bars.

3. In a machine of the type described, the combination with a cylinder, a shaft revoluble therein and a piston on said shaft, of an outer bar having projections and sliding faces at its ends, a pin at each end of said bar, side bars each having a longitudinal slot at one end adapted to be engaged by the pins, the ends of the side bars having projections and sliding faces, inner bars having endsadapted to said side bars, all of said bars being displaceable on said piston and adapted tov pack the same, and means tendingv to displace said bars, the arrangement being such that the projections of said bars are guided positively on the sliding faces of adjacent bars where said bars abut one another, as set forth.

4. Irr a machine of the type described, the combination with a cylinder,a shaft revoluble therein and a grooved piston on the shaft, of an outer bar having pins and sliding faces at its ends, said bars having slots at one end adapted to be engaged by said pins and having guides and curved faces at the other end, inner bars having rounded heads adapted to said guides and having curved faces adapted to the aforesaid curved faces, said bars being displaceable in the grooves on the piston and adapted to pack the same,

and means tending to displace said bars, the arrangement being such that the projections of said bars are guided positively on the sliding faces of adjacent bars where said bars abut one another.

5. In a machine of the type described, the combination with a cylinder having admission and exhaust ports, a shaft rotatable therein and a piston on said shaft, of a casing having a recess, a drum rotatably mounted in the casing, a rotary valve communicating with the admission port, and a conduit connecting the'valve with the recess, wherebyA the admission of the driving medium to the recess is regulated by the valve.

6. In a machine of the type described, the combination with a cylinder, a drive shaft rotatable therein and a piston on the shaft, of a casing, a drum therein, a driven shaft carrying the latter, clutch means fixed on the driven shaft, driving means provided with clutch means loose on the driven shaft and adaptedto engage with play with said former clutch means, driving means fixed on the drive shaft adapted to drive the aforesaid driving means and clutch means, whereby the rotation of said drum is accelerated once every revolution of the piston.

7. In a machine of the type described, the combination with a cylinder, a driveshaft rotatable therein and a piston on said shaft, of a casing, a drum, a driven shaft carrying the drum revoluble in the casing, a toothed wheel fixed on the drive shaft, a toothed wheel having clutch members loose on the driven shaft, clutch members fixed on the latter shaft adapted to engage clutch members on the drive shaft with play, a lever rigidly connected with the clutch member on the driven shaft, and a lever xed on the drive shaft, whereby the rota-tion of the drum is accelerated once every revolution of the piston.

8. In a machine of the type described, the combination of a rotary shaft, a piston thereon, an abutment drum in contact with the piston, a cylinder, and covers for the latter having inwardly projecting necks taking over the ends of the piston serving as ournals for the piston and shaft and a counter-bearing for the abutment drum.

In testimony that I claim the foregoing as my invention, I have signed myname in presence of two subscribing witnesses.

J OSEF ZURA.

Witnesses:

Joi-IANNEs HEIN, WOLDEMAR HAUPT. 

